摘要:
In one aspect, a method includes receiving write I/Os for storage in a primary storage array, splitting the write I/Os to a replica site, storing the write I/Os for storage in the storage array in a cache, periodically de-staging the write I/Os in the cache to a volume and after a cache data loss, restoring lost write I/Os from the cache by using the write I/Os split to the replica site.
摘要:
In one aspect, a method includes providing a splitter at a first storage array, receiving data from a host, storing the data on the first storage array, using a data protection appliance (DPA) to expose a device, continuously copying data stored on the first storage array to the device using the splitter and replicating the data to a second storage array using the DPA.
摘要:
A method, system and computer program product for enabling a virtual service layer to consume a storage medium at a first site and map the storage medium as one or more virtual storage volumes, enabling the virtual service layer to present the one or more virtual storage volumes for consumption at the first site, enabling a splitter of the virtual service layer to intercept I/O written to the one or more virtual storage volumes, splitting intercepted I/O to a journal based replication appliance, enabling the virtual storage volumes to be accessible at a second site, wherein the one or more the virtual storage volume are mirrored at the second site by the virtual service layer; and replicating IO from either the first site or the second site to a third site.
摘要:
A computer implemented method, system, and program product for asynchronous splitting in a virtual replication environment, the method comprising intercepting IO directed to one or more volumes, adding, at a splitter, ordering info to the IOs, and sending the IOs to an appliance.
摘要:
The punch command may be replicated in a replication environment including a production site and a replication site. The solution includes implementing a punch command to free storage received at a replication site in a replication environment by applying the punch command to storage at the replication site and writing data being freed from the storage at the replication site to an undo stream of a journal at the replication site. If the punch command is not supported, a command to write zeros may be used. Further, an unpunch command is provided for properly undoing a punch command and storing data written to the volume before the punch command freed the storage. Additionally, large punch commands may be split into a plurality to smaller punch commands for efficient journal management. Additionally, volume space may be reclaimed by writing a punch command to the journal instead of zeros.
摘要:
In one aspect, a method to replicate a key-value pair includes intercepting a command to update a key-value pair in a key-value pair database, the key-value database comprising metadata of a virtual volume, sending an updated key-value pair to a data protection appliance, receiving an acknowledgement that the data protection appliance received the updated key-value pair and updating the key-value pair in the key-value database after the acknowledgement is received.
摘要:
In one aspect, a method includes performing a failover in a journal-based replication system and performing a failback in the journal-based replication system without loss to journaling. In another aspect, an article includes a non-transitory machine-readable medium that stores executable instructions. The instructions cause a machine to perform a failover in a journal-based replication system and perform a failback in the journal-based replication system without loss to journaling. In a further aspect, an apparatus includes circuitry configured to perform a failover in a journal-based replication system and perform a failback in the journal-based replication system without loss to journaling.
摘要:
A method, system, and program product for implementing consistent snapshots in a replication environment, the replication environment having a production site having a splitter, and a storage media the method comprising, selecting a set of media from the storage medium, creating a consistency group of the selected set of storage media, creating a journal at the production site, splitting I/O to the consistency group, and recording the split I/O in the journal.
摘要:
Method and apparatus to provide a data replication system to receive a data transfer request from a first component at a transmitter module in a continuous data replication system having a production site and a backup site, the production site having a transmitter module and a transmitter credit mechanism, the transmitter module to transmit data over a network for replication in the backup site, detect a high-load condition at the transmitter module, and modify a flow of credits from the transmitter credit mechanism to the first component to reduce or stop data flow to the transmitter module.
摘要:
In one aspect, a method includes determining that a first quorum of servers is available at a production site and a target site and generating a group-set bookmark if the first quorum of servers is available. In another aspect, an article includes a non-transitory machine-readable medium that stores executable instructions. The instructions cause a machine to determine that a first quorum of servers is available at a production site and a target site and generate a group-set bookmark if the first quorum of servers is available. In a further aspect, an apparatus includes circuitry configured to determine that a first quorum of servers is available at a production site and a target site; and generate a group -set bookmark if the first quorum of servers available.